For the previous business day, in contracts. Harbor RBOB Composite Globex Volume Volume XRB G0 19,433 13,084 XRB H0 48,453 46,107 XRB J0 17,979 17,024 XRB K0 9,432 8,057 XRB M0 6,576 5,638 XRB N0 2,674 2,124 XRB Q0 1,413 1,063 XRB U0 1,969 1,394 XRB V0